PGCFA Knowledgebase
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Glossary

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  • Pediatric Glaucoma and Cataract Family Association
    A support organization run by families for families that provides information, resources, education, and support to parents of children with cataract and/or glaucoma (http://www.pgcfa.org).  Commonly referred to by the acronym PGCFA. 
     
  • Pediatric Glaucoma Family Association
    Predecessor to the Pediatric Glaucoma and Cataract Family Association (PGCFA).  Commonly referred to by the acronym PGFA. 
  • PGCFA
    See Pediatric Glaucoma and Cataract Family Association.
  • photophobia
    Sensitivity to light.  An individual with photophobia may experience pain and squeeze his/her eyelids shut to avoid the light. 
  • phthisis
    An eye that has stopped functioning, lost eye pressure, and shrunken. 
  • posterior capsule
    The membrane on the back surface of the natural lens of the eye.  The posterior capsule is sometimes left behind after a cataract is removed and may later become cloudy, requiring use of a laser to create a hole in the capsule through which the vision is clear.
  • posterior embryotoxon
     A white line on the peripheral edge of the inner surface of the cornea that can be seen during an examination with a slit lamp.  Posterior embryotoxon does not affect vision but is a sign of a malformed drainage system of the eye.  This phenomenon was once called Axenfeld anomaly but is now recognized as occurring in almost all forms of Axenfeld-Rieger spectrum.  Posterior embryotoxon can occur in patients with no other eye abnormalities, people who do not have glaucoma, or individuals who have certain syndromes that are not normally eye-related, such as Alagille syndrome with liver disease.  Strands of iris are sometimes attached to the posterior embryotoxon.
  • posterior uveitis
    Inflammation of the retina, vitreous, optic nerve, and/or choroid. 
  • preferential looking test
    A method of testing vision in patients who are non-verbal due to either age or developmental delay.  A card is presented to the patient and the child is observed to see whether he/she is more attentive to a series of vertical or horizontal bars on one side of the card compared with a blank area of the same size on the other side of the card. 
  • primary open angle glaucoma
    Increased pressure inside the eye that occurs after the age of 40 years old in an eye that has no other diseases and is not otherwise predisposed to develop glaucoma for any reason.
  • progressive
    A type of bifocal eyeglass lens in which the lens power gets increasingly stronger towards the bottom instead of having an abrupt line where the power suddenly becomes stronger.  Progressive lenses are also sometimes called invisible bifocals. 
  • prosthetic
    An artificial device that substitutes for a missing or defective part of the body. 
  • pseudophakic accommodation
    The ability of an eye with an intraocular lens implant to change its focusing ability, even without the natural lens that usually performs this task. 
  • pupil
    The hole in the center of the iris through which light enters the eye.